Metasurfaces are the bidimensional analog of metamaterials. There are made of resonant elements deposited on a thin film. They have been shown to allow for the control of polarization of light, in particular through topological effects and to make possible the transmission of a light beam under generalized refraction laws. In the present work, metasurfaces whose period is made of several resonant elements with both electric and magnetic dipoles are considered. A general theory of diffraction is developed and the possibility of optimization towards designing a predefined wavefront are investigated. To do so, we use multiple scattering theory as well as a singular perturbation approach that allows us to obtain a simple setting of the scattering problem in terms of a generalized impedance operator. This formulation is then used within an optimization algorithm in order to investigate the range of parameters over which a fine control of the transmitted beam can be obtained.
Didier Felbacq and Emmanuel Kling, "Wave front design using multiscale metasurfaces," Proc. SPIE 10356, Nanostructured Thin Films X, 103560G (Presented at SPIE Nanoscience + Engineering: August 10, 2017; Published: 30 August 2017); https://doi.org/10.1117/12.2273405.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 12,000 conference presentations, including many plenary and keynote presentations.